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Thailand eSIM

Bangkok, Phuket, Chiang Mai — install before you fly.
Activation
Instant on arrival
Network
True
Hotspot
Plan dependent
Refund
If it doesn't activate
Skip the Telstra roaming charge (AUD$2.5/day) in Thailand.

Choose your plan

Plans with 📞 include calls and SMS.
1 GB
7 days
$4
Buy
2 GB
15 days
$5.50
Buy
3 GB
30 days
$6
Buy
5 GB Popular
30 days
$8
Buy
10 GB
30 days
$11
Buy
20 GB Best value
30 days
$18
Buy
Unlimited data
Unlimited
15 days
$39
Buy
Unlimited
30 days
$49
Buy

Network coverage in Thailand

Thailand has strong mobile coverage across every mainland tourist corridor. AIS is the country's largest network, covering more than 98% of the population on 4G and over 85% on active 5G. Your Travelren Thailand eSIM roams on AIS with True Corp as a fallback. 5G is live across Bangkok, Chiang Mai, Phuket, Pattaya, Hua Hin, and Krabi, with typical download speeds between 80 and 180 Mbps in urban areas. Coverage on the major islands — Koh Samui, Koh Phangan, Koh Tao, Koh Lanta — is reliable in tourist villages and along main roads. Smaller islands such as Koh Lipe, Koh Kood, and the Similan and Surin island groups have patchy or no coverage. Bullet trains don't exist in Thailand; long-distance buses and trains have intermittent signal in rural stretches between provinces.

What works in Thailand

✅ Works well

  • Google Maps and Grab rideshare — both dominant in Thai cities
  • WhatsApp, Line, and Messenger (Line is the default chat app)
  • Google Translate camera mode for menus and signs
  • Booking long-distance travel via 12Go Asia and BookAway
  • Ordering food and groceries via GrabFood, foodpanda, and LINE MAN
  • Streaming on 5G in Bangkok, Phuket, and Chiang Mai
  • Tethering a laptop or tablet for work from cafes or hotels
  • Uploading photos and videos without hitting speed throttles

⚠️ Watch out for

  • Remote islands (Koh Lipe, the Similans, the Surins) and national parks have no reliable signal
  • Coverage inside older Bangkok shophouses and concrete condos can be weak — WiFi recommended indoors
  • A few government and banking apps require a local Thai phone number for OTP; none are tourist essentials
  • The BTS Skytrain in Bangkok does not accept international contactless bank cards for fares — you need a Rabbit card for BTS (MRT does accept contactless)

Arriving in Thailand

Suvarnabhumi (BKK) and Don Mueang (DMK) in Bangkok, plus Phuket (HKT) and Chiang Mai (CNX), all have free airport WiFi — typically capped at two hours a day in 15 minute sessions at around 1 Mbps, enough for a hotel address lookup but not much more. AIS, True, and dtac run 24 hour tourist SIM kiosks right in the arrivals hall at every major airport; data-only tourist SIMs start around ฿299 (roughly AUD$13) for 8 days unlimited data, but require your passport to register under Thai law. Cash is still widely used outside Bangkok, but contactless card payments work at 7-Eleven, Family Mart, Tops, Central, and most sit-down restaurants in tourist areas. From June 2026 the Bangkok MRT accepts tap-to-pay with any international Visa or Mastercard contactless card directly at the gate — no separate travel card needed. The BTS Skytrain still requires a Rabbit card.

Installing your Thailand eSIM

1
Install on your home WiFi

iPhone: Settings → Mobile Data → Add eSIM → scan the QR code from your email. Android: Settings → Connections → SIM Manager → Add eSIM. Takes about two minutes.

2
Land in Thailand

Install your Thailand eSIM at home on your own WiFi before you fly — it takes about two minutes. On iPhone: Settings → Mobile Data → Add eSIM, then scan the QR code from your email. On Android: Settings → Connections → SIM Manager → Add eSIM. Leave your home SIM as the primary line for calls and SMS. Switch the Thailand eSIM on for data only when you land. Your home number stays active throughout the trip. If you forget to install before departure, free airport WiFi at Suvarnabhumi and Don Mueang works for installation, though the two hour daily cap means it's better to arrive ready.

3
Keep your home SIM for calls

Leave your home SIM in. Set the Thailand eSIM as your data line only. Your number stays active the whole trip.

Check my device →

Good to know

A few details before you buy.

Calls and SMS

Most plans are data only — use WhatsApp or FaceTime for free. Look for the phone chip plan if you need a local number.

Compatibility

Your phone must be eSIM compatible and network-unlocked. Check yours →

Refunds

If your eSIM doesn’t activate, we’ll refund you in full. No questions asked.

Common questions

Which carrier does Travelren use in Thailand?
Your eSIM connects to AIS — Thailand's largest mobile network — with True Corp as a fallback. AIS covers over 98% of the population on 4G and more than 85% on active 5G. Your phone selects the strongest signal automatically. No APN configuration or manual network switching is required.
Will my eSIM work on Koh Samui, Phuket, and other islands?
Yes on the major islands. Koh Samui, Phuket, Koh Phangan, Koh Lanta, and Krabi province all have solid AIS 4G LTE with 5G in tourist towns. Smaller islands like Koh Lipe, Koh Kood, the Similans, and the Surins have weak or no coverage. For day trips to the Similan or Surin islands, plan to be offline.
How do I pay for the BTS Skytrain and MRT in Bangkok?
From June 2026 the MRT (Blue, Purple, Yellow, Pink lines) accepts tap-to-pay with any international contactless Visa or Mastercard directly at the gate. The BTS Skytrain does not — you still need a Rabbit card, sold at any BTS station for ฿200 including a top-up. Grab and Bolt rideshare are a practical alternative and work with any international card.
Does Thailand support eSIM?
Yes. AIS, True Corp, and National Telecom all support eSIM. iPhones from the XS onwards, Google Pixel 3 and later, and most recent Samsung Galaxy models all work. Important exception: iPhones purchased in mainland China do not include eSIM hardware even if the model number looks identical. Use travelren.com/device-check to confirm your phone in 30 seconds. Check my device →
Can I use my eSIM at Suvarnabhumi and Don Mueang airports?
Yes. Both Bangkok airports have strong AIS and True coverage throughout arrivals, immigration, baggage claim, and the taxi and Airport Rail Link areas. Your eSIM activates the moment your phone connects to a Thai network — usually while taxiing to the gate. Most travellers are online before reaching immigration.
How much does roaming cost without a Travelren eSIM?
Telstra charges AUD$2.50 per day under its International Day Pass for Thailand (Zone 2) with a 2 GB daily cap. AT&T's International Day Pass is USD$12 per day. EE charges £5 per day. Spark's 14 day Roaming Pack is NZD$30. Travelren plans are typically cheaper on a per-day basis and don't reset at a fixed midnight cutover that can shorten your final day. Check my device →
Is the free WiFi at Suvarnabhumi and Don Mueang any good?
It works for basic messages and a hotel lookup but not much more. Free airport WiFi is capped at two hours per day in 15 minute sessions at around 1 Mbps. For anything beyond arrival logistics — rideshare booking, video calls, uploads — install your Travelren eSIM before you fly so you're online the moment you land.
Do I need to register my SIM with my passport in Thailand?
Physical tourist SIMs bought at airport kiosks require passport registration under Thai law — staff scan your passport and activate the SIM. An eSIM purchased from Travelren skips this step entirely. You install it before you leave home, activate it on arrival, and no passport registration is required.

Still deciding? See Thailand plans from $4